In 1880 work began on the 3 acre plot in Mount Vernon purchased for a purpose-built
building
for the North London Hospital for Consumption and Diseases of the
Chest. The foundation stone was laid by the Duke of Connaught,
the third son of Queen Victoria, on 29th October. However, financial constraints delayed completion of
the project and only the
western block with 34 beds opened initially in 1881. Designed in a 17th century French
renaissance style, it had cost
£25,000. Fronting Frognal Rise, the building had a
northeasterly aspect; views of Middlesex and the Surrey hills
could be seen from the garden. The first floor of the 5-storey
block contained a ward for female patients, with the male ward on the
second floor. The kitchen, servants' quarters and nurses' rooms
were in the floors above. All the wards and rooms were heated by open
fires. The new Hospital was described as 'the most beautiful
hospital in London'.

In 1887 it was decided that the Secretary's
office and Out-Patients Department in Tottenham Court Road were
becoming 'unworthy of the Hospital' and a new purpose-built
Out-Patients Department was envisaged. Financial constraints made
this impossible. The lease on the building expired but was
renewed on a yearly tenancy while an extensive search for new premises
was undertaken. In 1891 the Out-Patients Department moved to new premises at 41 Fitzroy Square.

The next block to be built at Mount
Vernon - the central block - was officially opened by Princess
Christian (the third daughter
of Queen Victoria) in July 1893. She also paid off the debt of
£3000 owing on the building.
The central block contained an entrance hall, a dining room for
the patients and more ward accommodation. The Hospital then had
80 beds but, by 1898, only 60 of these were in
use because of financial constraints. In 1899 balconies were
built on the blocks to enable patients to stay in the open air as part
of
their treatment. They opened in June 1900, as well as a temporary
extension.

In 1901 the name of the Hospital was changed to the
Mount Vernon Hospital for Tuberculosis and Diseases of the Lungs to avoid confusion with the nearby North West London Hospital.
In 1902 a new X-ray apparatus was installed at a cost of
£70 to aid in diagnosis. High frequency electrical currents ('D'Arsonvalisation')
were used for treatment. This was an early form of electric
diathermy. In effect, the patient was gently microwaved; the
benefits came from elevation of the deep tissue temperatures. The
open-air balconies were removed
(maybe for safety reasons) and a temporary marquee erected instead.
It had a raised wooden floor, but was open on all sides, and
could house 16 male patients.

The eastern block was
completed in 1903 and officially opened by the Marquis of Zetland,
President of the Hospital. The new block had accommodation for 45
patients, giving the Hospital a total of 140 beds. Mount Vernon
House, built in 1800, which had been the residence of the Hospital Secretary, became the Nurses' Home.

In 1902 the Out-Patient premises at 41
Fitzroy Square were again thought to be unsuitable. The building
was sold for £3500 and the Out-Patients Department and Hospital
offices moved to 7 Fitzroy Square, a larger building which could also
accommodate a pathology laboratory. The cost of purchase of the
building and alterations came to £3750.

In 1904 a branch of the Hospital opened on a site south of the Rickmansworth Road in Northwood, a district that attracted several hospitals.

In 1908 the Hospital was connected to mains
electricity and it was found that better X-ray images were obtained
than with the accumulator.

In March 1913, because of financial
difficulties caused by the Insurance Act (local authorities were
compelled to make arrangements for the treatment of their tuberculous
patients), the Hospital governors
decided to transfer all services to the Northwood site. In July
the entire consultant staff and the majority of the acting staff
resigned because of the summary dismissal of two junior consultants at
Northwood.

At the outbreak of WW1 the building was
offered to the War Office for use as a hospital. The War Office,
in their turn, offered it first to the Canadian Contingent for use as
their No. 1 Canadian Stationary Hospital. The unit, which had
been formed at Valcartier on 13th September 1914, had spent just over
three weeks at Salisbury Plain before being ordered to take over Mount
Vernon. The Hospital required extensive equipment to make it fit
for purpose, with overhauling of the plumbing and some structural
alterations, including the installation of an operating theatre.
The work took two months and was completed on 28th January 1915,
when the Hospital was declared ready to accept patients. On the
following day the unit received orders to proceed overseas. On
31st January it embarked at Southampton, together with No. 1 Canadian
Clearing Station, to sail to Boulogne, where it opened up at Honeault
Camp at Wimereux.

In March 1915 the War Office assigned the
Hospital to the Army, and it became The Military Hospital, Hampstead.
Four additional huts,
each to hold 25 patients, were built in the grounds of the Hospital.
The total patient accommodation was 230 beds. The nursing
staff consisted of a Matron, six Sisters (two from the Regular Military
Nursing Service and four from the Reserve) and 8 members of a Voluntary
Aid Detachment. Convalescent soldiers wore new hospital uniforms
- blue coats with white facings, matching trousers and a scarlet tie.
In 1916 it became a special army research hospital for the study
and treatment of cardiac cases among army personnel. One of its
main projects was investigation into effort syndrome,
or disorderly action of the heart, commonly known as 'soldier's heart'.
By 1917 the premises had become too small for the number of
patients presenting themselves and the heart unit moved to the Sobroan Barracks Military Hospital in Colchester.

In December 1917 the Mount Vernon buildings became the Royal Flying Corps Central Hospital. In March 1918 an Air Medical Investigation Committee
was established to investigate the problems of special disabilities
associated with flying, especially anoxaemia (oxygen deficiency) caused
by flying at high altitudes.

Flying cadets applying for commissions were
examined by Royal Flying Corps Boards at the Hospital, especially
eyesight tests (concealed hypermetropia - farsightedness - was a
serious obstacle to efficient landing), the condition of the
cardiovascular system (changes in pulse rate after exercise), the
nervous system (absence of tremor), muscular ability (carrying out
successfully balancing objects in unstable equilibrium at arm's length)
and vestibular stability (testing the gait after rotation in a chair).
Medical examination
also include 'habits' - a habitual excessive use of alcohol was a
sufficient cause for rejection, and a careful record was made of the
number of cigarettes smoked daily and whether they were inhaled; games
and sports; occupation; illnesses; family history; heart; pulse;
thorax; abdomen; nervous system and mentality. Cardiovascular
debility was one of the most frequent causes of rejection, as was
nervous instability. Invalid officers also attended the Boards
for physical examination to ascertain whether they were fit to return
to their units.

In 1919 the Hospital moved to Avenue House in Finchley, but the National Institute for Medical Research
continued its work in various locations in London until 1920, when it
returned to Mount Vernon after the Military Hospital closed and the
buildings had been refitted for laboratory work.

Present status (September 2009)

The National Institute for Medical Research was renamed the Medical Research Council
in 1920. It remained in the Mount Vernon Hospital buildings until
1950, when most of its departments moved to a purpose-built institute
in Mill Hill. The remainder stayed at Mount Vernon until the work
on biological standardization became independent in 1972 as the National Institute for Biological Standards and Control.

The site of the first Out-Patients Department of the Hospital at 216 Tottenham Court Road from 1861 until 1891.

41
Fitzroy Square, the second site of the Out-Patients Department from 1891 until 1902, is on the
corner of Grafton Way and Charlotte Street. The site has been redeveloped
and is now the Indian YMCA. This section of Charlotte Street was once named Russell Place.

The third Out-Patients Department from 1902 until 1932 at 7 Fitzroy Square, once the home of the artist Sir Charles Eastlake.

Mount
Vernon was named after General Charles Vernon, who was the Lieutenant
of the Tower of London from 1763 until he died in 1810. He bought
the land in Hampstead in 1770.